Synthesis, Structures, and Catalytic Properties of Dinuclear Iridium(I) Complexes with a Hexadentate Macrocyclic Diamine‐Tetracarbene Ligand

Four dinuclear Ir I complexes with macrocyclic diamine‐tetracarbene ligands were synthesized and characterized, two of which and a related mononuclear complex were found to be the first examples of Ir N‐heterocyclic carbene complexes exhibiting catalytic performance toward 1,4‐addition of arylboronic acids to cyclohex‐1‐en‐2‐one.